Here you can download old versions of VoceVista Video and Overtone Analyzer.
Release notes and version history

VersionDateOvertone Analyzer for MacVoceVista Video for MacVoceVista Video Pro for MacOvertone Analyzer for PCVoceVista Video for PCVoceVista Video Pro for PC
5.3.4June 4, 2020downloaddownloaddownload
5.3.3January 5, 2020downloaddownloaddownloaddownloaddownloaddownload
5.1.0August 3, 2018downloaddownloaddownloaddownloaddownloaddownload